Correctly store the OC version in the config file (#114)

* fix extraneous @Version@

* don't doublecopy

* spotless don't gradle

addon.gradle

@@ -1,5 +1,12 @@
+import org.apache.tools.ant.filters.ReplaceTokens
+
 tasks.withType(ScalaCompile) {
     scalaCompileOptions.forkOptions.with {
         memoryMaximumSize = '4g'
     }
 }
+tasks.named("processResources", ProcessResources).configure {
+    filesMatching("application.conf") {
+        filter(ReplaceTokens, tokens: [version: project.version])
+    }
+}

src/main/resources/application.conf

@@ -7,7 +7,7 @@ opencomputers {
   # The version of OC this config was generated by. This is used to allow the
   # mod to reset parts of the config when their meaning changed across
   # versions, so that the user does not have to delete it.
-  version: "@VERSION@"
+  version: "@version@"
 
   # Client side settings, presentation and performance related stuff.
   client {